Abstract

SUMMARY This paper extends the analysis of a companion paper to ternary condensing gas drives. Displacement of oils, composed of butane and decane, by injection gas composed of methane and butane is described. The effects of interlayer permeability ratio and injection gas enrichment level on composition paths, composition and saturation profiles, and oil recovery are reported. The results presented lead to the conclusion that the minimum solvent enrichment level determined in one-dimensional flow experiments is not necessarily the optimum economic enrichment level for flow in heterogeneous reservoir settings.

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